<template>
  <el-container class="home-container">
    <!--头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>
    <!--页面主体区域 -->
    <el-container>
      <!--侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <!--折叠按钮 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!--侧边栏菜单区域 -->
        <el-menu
          :default-active="activePath"
          router
          :collapse-transition="false"
          :collapse="isCollapse"
          unique-opened
          background-color="#333744"
          text-color="#fff"
          active-text-color="#ffd04b">
          <!--一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!--一级菜单模版区域 -->
            <template slot="title">
              <!--图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!--文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单 -->
            <el-menu-item :index="'/'+item.path" v-for="item in item.children" :key="item.id"
                          @click="saveNavPath('/'+item.path)">
              <template slot="title">
                <!--图标 -->
                <i class="el-icon-menu"></i>
                <!--文本 -->
                <span>{{item.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data: function () {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created: function () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 点击登录
    loginOut: function () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    getMenuList: async function () {
      var { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('获取菜单列表失败！')
      this.menuList = res.data
      console.log(res.data)
    },
    // 点击按钮切换菜单的折叠与展开
    toggleCollapse: function () {
      this.isCollapse = !this.isCollapse
    },
    // 保存激活状态
    saveNavPath: function (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: white;
    font-size: 20px;

    div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;

    .el-menu {
      border-right: none;
    }
  }

  .el-main {
    background-color: #EAEDF1;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    color: white;
    text-align: center;
    line-height: 24px;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
